Godly endurance

You use a burst of godly power to take 2 bonus actions and then you roll a d20

If you get a 1-10 you take 1 d10 of damage

If you get an 11-20 you add a level of exhaustion 

You subtract your constitution bonus from your roll

if you get 0 or under as your total roll, you take 1d4 of damage instead

You subtract you endurance (Str and Con Avg.) from the amount of damage you take